What happens to temperature during a phase change?

• It increases
• It decreases
• It remains constant until the change is completed
• It increases and then quickly decreases

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A substance that contains only one type of atom is a(n)

• compound
• element
• heterogeneous mixture
• homogeneous mixture

Which of these is a pure substance?

• bread
• table salt
• garden soil
• sea water

Two or more elements chemically combined:

• an atom
• a compound
• a mixture
• a pure substance

Tags

NGSS.MS-PS1-1

A mixture that appears to be evenly mixed throughout:

• an atom
• a compound
• a homogeneous mixture
• a heterogeneous mixture

Chemical or Physical Change?

• Chemical
• Physical

A material made up of 2 or more substances that can be easily separated by physical means is a ___?

• compound
• colloid
• mixture
• solution

What term describes a gas changing to a liquid?

• Deposition
• Sublimation
• Evaporation
• Condensation

Tags

NGSS.MS-PS1-4

Solids melt when solid particles _____ energy, liquids freeze when liquid particles _____ energy.

• absorb, release
• release, absorb
• absorb, absorb
• release, release

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Liquid particles are...

• tightly packed
• loosely bonded and flowing
• free to fly in all directions
• rigid and can not change shape